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Biological Production of Ethanol From Coal

Description: Research is continuing in an attempt to increase both the ethanol concentration and product ratio using C. ljungdahlii. The purpose of this report is to present data utilizing a medium prepared especially for C. ljungdahlii. Medium development studies are presented, as well as reactor studies with the new medium in batch reactors. CSTRs and CSTRs with cell recycle. The use of this new medium has resulted in significant improvements in cell concentration, ethanol concentration and product ratio.
Date: January 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cementitious yttria products

Description: An investigation has been made of the physical properties and formation conditions of cements formed in the yttria/salt/water system. Cementitious binders were of the nominal Y/sub 2/(OH)/sub 5/X.H/sub 2/O type (where X represents the Cl/sup -/ or NO/sub 3//sup -/). An ammonium nitrate-produced yttria cement was shown to be sinterable and was demonstrated to form very refractory castable concretes with zirconia or alumina aggregates.
Date: March 1, 1978
Creator: Holcombe, C. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Biological production of organic solvents from cellulosic wastes. Progress report, September 15, 1976--September 14, 1977

Description: The objectives of this project are to optimize a modular process to convert cellulosic wastes to butanol and other oil-sparing chemicals. Research to date has focused on developing analytical methods, establishing a good data base and improving cellulase yields. Reliable assay methods for the Thermoactinomyces cellulase complex have been developed, measuring glucose and reducing sugar from filter paper and Avicel for total cellulase activity, viscosity change with carboxymethyl cellulose for th… more
Date: June 1, 1977
Creator: Pye, E.K.; Humphrey, A.E. & Forro, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Possible explosive compounds in the Savannah River Site waste tank farm facilities

Description: Based on a comparison of the known constituents in high-level nuclear waste stored at the Savannah River Site (SRS) and explosive compounds reported in the literature, only two classes of explosive compounds (metal NO{sub x} compounds and organic compounds) were identified as requiring further work to determine if they exist in the waste, and if so, in what quantities. Of the fourteen classes of explosive compounds identified as conceivably being present in tank farm operations, nine classes (m… more
Date: March 15, 1992
Creator: Hobbs, D. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Studies on the LASL cadmium-cadmium carbonate cycle

Description: The following results were obtained from studies on the cadmium-cadmium carbonate cycle. A new lower limit for the heat of formation of CdO(g) has been estimated ..delta..H/sup 0//sub f,298/ > 113.8 kJ/mol. Hydrogen production is subject to catalysis. While Pd is an effective catalyst, NH/sub 4/Cl shows greater catalytic activity. Seventy-two percent of the total available H/sub 2/ is formed in one-half hour at 523/sup 0/K using NH/sub 4/Cl as a catalyst. Four to five moles of water must be rem… more
Date: January 1, 1980
Creator: Mason, C. F. V.; Bowman, M. G. & Behrens, R. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recovery of anaerobic digestion after exposure to toxicants. Final report

Description: The concept that methane fermentation cannot tolerate chronic or slug doses of toxicants has almost totally precluded methane fermentation as a viable contender for the treatment of industrial wastewaters. This study assayed a wide variety of toxicants, heavy metals, inorganic salts, organic chemicals, solvents, and antibiotics which are used in industrial processes and, therefore, appear in the industrial wastewaters therefrom. Toxicity was related to the reduction in methane production of a c… more
Date: December 1, 1979
Creator: Yang, J.; Parkin, G. F. & Speece, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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1988 Wet Deposition Temporal and Spatial Patterns in North America

Description: The focus of this report is on North American wet deposition temporal patterns from 1979 to 1988 and spatial patterns for 1988. It is the third in a series of reports that investigate the patterns of annual precipitation-weighted average concentration and annual deposition for nine ion species: hydrogen, sulfate, nitrate, ammonium, calcium, chloride, sodium, potassium, and magnesium. Mosaic maps, based on surface estimation using kriging, display concentration and deposition spatial patterns of… more
Date: March 1, 1992
Creator: Simpson, J. C.; Olsen, A. R. & Bittner, E. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Macro-encapsulation of heat storage phase-change materials for use in residential buildings. Second quarterly progress report, December 29, 1976--March 29, 1977

Description: Objectives of the work are to assess the feasibility of macro-encapsulated phase change materials (PCM's) for residential solar systems and to develop and evaluate such materials. Encapsulant materials under consideration are multilayer flexible plastic films, steel cans, and plastic bottles. PCM's under study are Mg(NO/sub 3/)/sub 2/.6H/sub 2/O, naphthalene-benzoic acid eutectic, stearic acid, Mg(NO/sub 3/)/sub 2/.6H/sub 2/O-NH/sub 4/NO/sub 3/ eutectic, and CaCl/sub 2/.6H/sub 2/O. Compatibilit… more
Date: May 1, 1977
Creator: Lane, G. A.; Hartwick, P. B. & Rossow, H. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Organ/inorganic interactions of nitrogen in oilfields: Part 1, Geochemistry

Description: A detailed investigation of the geochemistry of nitrogen in oilfields is being conducted in order to test the model that N is generated from hydrocarbons during thermal maturation and is incorporated into authigenic clay minerals in the sediments through which the oil and brines migrate. If the model is correct, there should be fixed-NH{sub 4} anomalies that can be correlated across an oilfield to indicate the pathway of migration into the trap. The preliminary data from this research shows tha… more
Date: May 1992
Creator: Williams, Lynda B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Catalyst dispersion and activity under conditions of temperature-staged liquefaction

Description: The general objectives of this research are (1) to investigate the use of highly dispersed catalysts for the pretreatment of coal by mild hydrogenation, (2) to identify the active forms of the catalysts under reaction conditions and (3) to clarify the mechanisms of catalysis. The ultimate objective is to ascertain if mild catalytic hydrogenation resulting in very limited or no coal solubilization is an advantageous pretreatment for the transformation of coal into transportable fuels. The experi… more
Date: February 1, 1992
Creator: Davis, A.; Schobert, H.H.; Mitchell, G.D. & Artok, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Catalyst dispersion and activity under conditions of temperature- staged liquefaction

Description: The general objectives of this research are (1) to investigate the use of highly dispersed catalysts for the pretreatment of coal by mild hydrogenation, (2) to identify the active forms of the catalysts under reaction conditions and (3) to clarify the mechanisms of catalysis. The ultimate objective is to ascertain if mild catalytic hydrogenation resulting in very limited or no coal solubilization is an advantageous pretreatment for the transformation of coal into transportable fuels. The experi… more
Date: September 1, 1991
Creator: Davis, A.; Schobert, H.H.; Mitchell, G.D. & Artok, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Distribution Ratios on Dowex 50w Resins of Metal Leached in the Caron Nickel Recovery Process

Description: Pressurized ion exchange on Dowex 50W-X8 and 50W-X12 resins was investigated using elution techniques to determine distribution ratios for copper, nickel, and cobalt complexes contained in ammonium carbonate solution, a mixture which approximates the waste liquor from the Caron nickel recovery process. Results were determined for different feed concentrations, as well as for different concentrations and pH values of the ammonium carbonate eluant. Distribution ratios were compared with those pre… more
Date: May 1, 1980
Creator: Reynolds, B. A.; Metsa, J. C. & Mullins, M. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Macro-encapsulation of heat storage phase-change materials for use in residential buildings. Third quarterly progress report, March 29, 1977--June 29, 1977

Description: Objectives are to assess the feasibility of macro-encapsulated PCMs for residential solar systems and to develop and evaluate such materials. Encapsulant materials under consideration are multilayer flexible plastic films, steel cans, and plastic bottles. PCMs under study are Mg(NO/sub 3/)/sub 2/.6H/sub 2/O, naphthalene-benzoic acid eutectic, Mg(NO/sub 3/)/sub 2/.6H/sub 2/O-NH/sub 4/NO/sub 3/ eutectic, and CaCl/sub 2/.6H/sub 2/O. Compatibility studies between the PCMs and encapsulant materials … more
Date: August 1, 1977
Creator: Lane, G. A.; Hartwick, P. B. & Rossow, H. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Di-n-amyl-n-amylphosphonate and tricaprylmethylammonium nitrate as potential extractants for reprocessing Th-U fuels

Description: Both 2F di-n-amyl-n-amylphosphonate in n-dodecane (DA(AP)-DD) and 0.77F tricaprylmethylammonium nitrate in Aromatic 100 (TCMA.NO/sub 3/-AR100) extract uranium and thorium into relatively concentrated organic solutions. Countercurrent-flow tests with each extractant have demonstrated effective uranium-thorium separations by selective stripping from the organic phase. Both extractants offer advantageous alternatives to tributylphosphate (Thorex) in reprocessing irradiated mixed ThO/sub 2/-UO/sub … more
Date: September 1, 1979
Creator: Diamond, H.; Sabau, C.S.; Horwitz, E.P.; Vandergrift, G.F. & Mason, G.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermochemical cycles for energy storage: Thermal decomposition of ZnCO sub 4 systems

Description: The overall objective of our research has been to develop thermochemical cycles that can be used for energy storage. A specific cycle involving ammonium hydrogen sulfate (NH{sub 4}HSO{sub 4}) has been proposed. Each reaction in the proposed cycle has been examined experimentally. Emphasis has been placed on the basic chemistry of these reactions. In the concluding phase of this research, reported herein, we have shown that when NH{sub 4}HSO{sub 4} is mixed with ZnO and decomposed, the resulting… more
Date: April 1, 1992
Creator: Wentworth, W.E. (Houston Univ., TX (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Colorimetric determination of Fe sup 2+ /Fe sup 3+ ratio in radioactive glasses

Description: In the vitrification of nuclear wastes, the Fe{sup 2+}/Fe{sup 3+} ratio in the glass is a measure of the redox properties of the glass melt. It is necessary to measure this ratio to ensure that the melt redox properties are suitable for the glass melter. A colorimetric method for measuring the Fe{sup 2+}/Fe{sup 3+} ratio in highly radioactive glasses was developed and tested remotely in a shielded cell. The tests were performed on glasses similar in composition and radioactivity to those that w… more
Date: January 1, 1992
Creator: Coleman, C. J.; Baumann, E. W. & Bibler, N. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pellet fabrication development using thermally denitrated UO sub 2 powder

Description: Pacific Northwest Laboratory (PNL) has evaluted, on a laboratory scale, the characteristics and pellet fabrication properties of UO{sub 3} powder prepared by the thermal denitration process. Excellent quality, 96% TD (percent of theoretical density) pellets were produced from development lots of this powder. Apparently, the key to making this highly sinterable powder from uranyl nitrate is the addition of ammonium nitrate (NH{sub 4}NO{sub 3}) to the feed solution prior to thermal denitration. P… more
Date: May 1, 1992
Creator: Davis, N. C. & Griffin, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Catalyst dispersion and activity under conditions of temperature- staged liquefaction

Description: The general objectives of this research are (1) to investigate the use of highly dispersed catalysts for the pretreatment of coal by mild hydrogenation, (2) to identify the active forms of catalysts under reaction conditions and (3) to clarify the mechanisms of catalysis. The ultimate objective is to ascertain if mild catalytic hydrogenation resulting in very limited or no coal solubilization is an advantageous pretreatment for the transformation of coal into transportable fuels. The experiment… more
Date: February 1, 1992
Creator: Davis, A.; Schobert, H.H.; Mitchell, G.D. & Artok, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Macro-encapsulation of heat storage phase-change materials for use in residential buildings. Fifth quarterly progress report, September 29, 1977-December 29, 1977

Description: Objectives are to assess the feasibility of macro-encapsulated PCM's for residential solar systems, to develop and evaluate such materials. Encapsulant materials under consideration are multilayer flexible plastic films, steel cans, and plastic bottles. PCM's under study are Mg(NO/sub 3/)/sub 2/.6H/sub 2/O, stearic acid, Mg(NO/sub 3/)/sub 2/.6H/sub 2/O-NH/sub 4/NO/sub 3/. A study of the storage capability of CaCl/sub 2/.6H/sub 2/O encapsulated in polyethylene bottles has been completed.
Date: March 1, 1978
Creator: Lane, G. A.; Warner, G. L.; Hartwick, P. B. & Rossow, H. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analytical summary of experimental data from two years of hourly sequential precipitation samples at Brookhaven National Laboratory

Description: Hourly precipitation samples were collected at Brookhaven National Laboratory from June 1976 through May 1978 with the Brookhaven Automatic Sequential Precipitation Sampler. Conventional meteorological data were recorded for each sample period. The samples were analyzed for pH, conductivity, and concentrations of sulfate, nitrogen, ammonium, sodium, and chloride ions. Ratios of selected ions, excess conductivity above the H/sup +/ contribution, and excess sulfate and chloride above the seawater… more
Date: May 1, 1979
Creator: Raynor, G. S. & Hayes, J. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of humidity during photoprocessing on thin film metallization adhesion

Description: Humidity effects during photoprocessing on tantalum/chromium/gold thin film networks (TFNs) were investigated. Humidity conditions at various process steps were controlled by placing either desiccant or water in handling containers for the TFNs. The TFNs photoprocessed in humid conditions had a much higher occurrence of metallization failures compared to TFNs processed in dry conditions. Ceramic surface defects were shown to cause pores in the thin films, and these pores enhanced corrosion susc… more
Date: March 1, 1980
Creator: Norwood, D.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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